* The composite primary endpoint was defined as the onset of left-sided CHF, cardiac-related death, or euthanasia; dogs in the pimobendan group were significantly less likely to reach this endpoint. Median time to composite primary endpoint was 1228 days in the pimobendan group and 766 days in the placebo group (P=0.0038). †Ten percent more life without CHF was calculated based on an estimated lifespan for all small- to medium-sized dogs being 12.5 years. Fifteen months is equal to 1.25 years, which is 10% of 12.5 years.

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